Question

Найдите значение выражений. 15* (1/2)2 -9* (2/3)2

Answer 1

 15* (1/2)2 -9* (2/3)2= 15*1/4 - 9*4/9= 15/4-4= - 1/4

Answer 2

15*(1/2)*2-9*(2/3)*2=3 

1) 15*2*(1/2)=30*(1/2)=30/1*1/2=15

2) 9*2*(2/3)=18*(2/3)=18/1*2/3=12

3) 15-12=3